Pick-up jack



J. C. M KINZIE Feb. 2, 1932.

PICK-UP JACK Filed NOV. 14, 1930 INVENTOR. I I

' ATTORNEY.

Patented Feb. 2, 1932 8 UN TED STATES JACK C. MCKINZIE, OF GBAYBAOK, TEXAS PICK-UP JACK Application filed November 14, 1930. Serial No. 495,720.

This invention relates to a pick-up jack for oil wells and has for its primary object to provide, in a manner as hereinafter set forth, means for utilizing the power line for a pump to'lii't the sucker rod of the pump intooperating position in the event of the sucker rod dropping into a well following the breaking of the operative connection between the sucker rod and power line.

A further object of the invention is to provide a pick-up jack of the character aforesaid, which may be permanently installed with respect to a power line and pump to form a part of the operative connection therebetween if'desi'red, the pick-up jack including means for-readily rendering the same inactive as a pick-up jack when so employed.

Vith the foregoing and other objects in view, the invention consists of the novel construction, combination and arrangement of parts as hereinafter more particularly described, and as illustrated in the accompanymg drawlngs whereln 1s shown anembod1- ment of the invention, but it is to be understood that the description and drawings are to be taken as illustrative and that the inventionis intended to be limited only by the scope of the claims hereunto appended.

In the accompanying drawings in which like numerals are employed to designate like partsthroughout the several Views Figure 1 is a diagrammatic view showing a pick-up jack in accordance with-this invention in assembled relation with respect to a power line and pump.

Figure 2 is an enlarged sectional elevation of thepick-up jack.

Figure 3 is a section taken at a point indicated by the line 3-3 of Figure 2.

Figure 4 is a perspective View of one of the manually controlled, pawl shifting elements.

Referring'to the drawings in detail, the numeral 1. indicates generally a pump which may be of any well known construction, the pump as shown including an oscillating element. 2, by the operation of which the up stroke is imparted to the sucker rod 3, the down stroke of such sucker rod being caused by gravity. Connected with the element 2 is a rod line 4 which extends through a series of spaced guides 5 as well as through a rub post 6. The line 4 is provided at one end with a hook 7 which is adapted for connection with a power line 8 in the normal operation of the pump. The power line 8 is operated with a reciprocating movement from any well known type of power house, such as indicated conventionally at 9. A hook off line 11 is shown, which is adapted to have the rod line 4 connected therewith in the event that it is desired to discontinue the operation of the pump withoutdiscontinuing the operation of the power line 8.

It frequently happens that some part of the operative connection between the sucker rod 3 and power line 8, such as the rod'line 4, be-v comes broken, which results in the sucker rod 3 dropping into the well. In such an event, my pick-up jack may be employed to connect the power line 8 with the rod line 4 in such a manner that the power line may be utilized for lifting the sucker rod into 0perative position after the necessary repairs have been made.

The pick-up jack includes a pair of side plates 12, which are connected together byv means of plurality of bolts 13, and which are spaced apart by means of a plurality of rollers disposed between the plates 12 and rotatably mounted on the bolts 18. The rollers are arranged in two sets of three rollers each, each of such sets including acpair ofhorizontally aligned rollers and further including a roller arranged in spaced relation to and in vertical alignment with one of the rollers of the horizontally aligned pair. The horizontally aligned rollers of one set are indicated by the numeral 14, and the vertically spaced roller'ot' such set is indicated by the numeral 15. The horizontally aligned rollers of the other set are indicated by the numeral 16, and the vertically spaced roller of the last mentioned set is indicated by the numeral 17 Slidably extending between the rollers 14 and 15 is a rack 18, one end of which is provided with a hook 19 for engagement with the power line 8, and the other end of which is provided with a coiled spring 20 which is rigidly secured to the rub post 6. Pivotally secured between the plates 12, adjacent the roller 15, is a pawl 21 which e2;- tends at a downward inclination into engagement with the teeth 22 of the rack 18. slidably extending between the rollers 16 and 17 is a rack 23, one end of which is provided with the hook 24k for engagement with the hook off line 11, and the other end of which is provided with a chain 25 which extends around the rub posts 6. Adjacent the roller 17 is a pawl 26 similar to the pawl 21, the pawl 26 extending at a downward inclination for engagement with the teeth 27 of the rack 23.

In the operation of the pick-up jack, the movement of the power line 8 towards the left as viewed in Figure 1, causes the rack 18 to engage the pawl 21 whereby the plates 12 are moved to the left with the rack 18 and power line 8. The hook 7 of the rod line 4; is connected with a strap 28 secured to the plates 12, by means of which the rod line 4 is moved to the left with the power line,

I such, movement of the rod line operating the element 2 to lift the sucker rod 3. Upon the completion of the movement of the power line 8 to the left, the rack 18 is returned to its original position by the tension of the spring 20. Owing to the engagement of the rack 23 with the pawl 26, and to the engagement of the hook 24 of the rack 23 with the hook off line 11, the plates 12 are prevented from mov ing to the right with the rack 18, the teeth 22 of the latter riding past the pawl 21. lNhen the power line 8 again moves towards the left, the plates 12 will be moved therewith as aforesaid, and the plates 12 will be prevented from returning to the right with the rack 18 by means of the pawl 26, rack 23 and hook off line 11. From the foregoing it will be readily seen that the sucker rod 3 will be lifted during each movement of the power line 8 to the left, and will be held in its lifted position during the movement of the power line to the right.

After the sucker rod has been lifted to its operative position, the pick-up jack may be disconnected if desired and the hook 7 connected directly with the power line 8, or the hook 24 may. be disconnected from the hook off line 11 and the pick-up jack retained as a part of the operative connection between the oscillating element 2 and power line 8. When the rack 23 is disengaged from the hook off line 11, the racks 18 and 23 and plates 12 move as a unit with the power line 8 inhoth directions.

in order that the pick-up jack may be retained as a part of the operative connection between the oscillating element 2 aiid power line 8, without disconnecting the hook 24 from the line 11, I provide a manually con- A trolled shifting element 29 for the pawl 26.

The element 29 is of rod like form'rotatably extending through the plates 12, and formed at one end with an offset grip portion 30. Between the plates 12, the element 29 is formed with a cam 31 which is normally out of contact with the pawl 26. Upon rotating the element 29 substantially 90, the pawl 26 is raised to the position shown in dotted lines in Figure 2, in which position, the tapered edge of the cam 31 is engaged in a notch 32 formed in the lower face of the pawl 26. lVith the pawl 26 thus held out of engagement with the teeth 27, the plates 12 and rack 18"move with the power line 8, independently of the rack 23. The element 29 engages the plates 12 with sufficient snugness to maintain the element 29 in any position desired by friction.

A similar shifting element 33. is provided for the pawl 21, in order that the latter may be lifted to the position shown in dotted lines in Figure 2, when it is desired to employ the pick-up jack to operatively connect the line 4. with the line 11, withontdisconnecting the hook 19 from the power line 8. V'Jhen the pick-up jack is so employed, the rack 18 moves bodily with the power line 8,

while the plates 12 and rack 23Vremain stationary. The element 33 is formed with a cam 34 for engagement with a notch 35in the pawl 21, the cam 34 and notch 35 being identical with the cam 31 and notch 32 respectively. The element 33 also is formed at one end with a grip portion 36 similar to the grip portion 30 of the element 29.

It thought that the many'advantages of T.

a pick-up jack in accordance with this in vention Wlll be readily apparent, and although the preferred embodiment-of the invention is as illustrated and described, it is to be understood that changes in the size, shape and arrangementof parts may be re-.

sorted to, so long as such changes fall within the scope of the invention as defined in the appended claims.

N hat I claim is:

1. In a pick-up jack for interposition between a rod line and a reciprocating power line, a plate for connection with the rod line, a reciprocating rack slidably mounted with respect to the plate and adapted for connection with the power line, a pawl carried by the plate for engagement with said rack to prevent relative movement between the plate and rack in one direction, a stationary rack adjacent the plate, and a pawl carried by the plate for engagement with the stationary rack to prevent relative movement between the stationary rack and plate in said direction. J I

2. in a pick-up jack for interposition between a rod line and a reciprocating power line, a pair of spaced plates for connection with the rod line, a reciprocating rackslidably mounted with respect to the plates and adapted for connection with the power line,

a pawl carried by the plates for engagement with said rack to prevent relative movement between the plates and rack in one direction, a stationary rack extending between the plates, and a pawl carried by the plates for engagement with the stationary rack to prevent relative movement between the stationary rack and plates in said direction, said reciprocating rack being provided at one end with a tension element for moving said rack in one direction.

3. In a pick-up jack for interposition between a rod line and a reciprocating power line, a pair of spaced plates for connection with the rod line, a reciprocating rack slidably mounted with respect to the plates and adapted for connection with the power line, a pawl carried by the plates for engagement with said rack to prevent relative movement between the plates and rack in one direction, a stationary rack extending between the plates, and a pawl carried by the plates for engagement with the stationary rack to prevent relative movement between the stationary rack and plates in said direction, said plates having sets of spaced rollers interposed therebetween, each of said racks being disposed between the spaced rollers of a set.

4. The combination with a pump for lifting a sucker rod, a reciprocating power line, a hook off line, and a rod line for operatively connecting the pump and power line, of a pick-up jack for interposition between the power line and red line, said pick-up jack including a pair of spaced plates connected with the rod line, a pair of racks slidably mounted with respect to the plates and respectively connected with the power line and hook off line, and a pair of pawls carried by the plates and engaging the racks to prevent relative movement between the plates and racks in one direction.

5. The combination with a pump for lifting a sucker rod, a reciprocating power line, a hook ofi line, and a rod line for operatively connecting the pump and power line, of apick-up jack for interposition bet-ween the power line and rod line, said pick-up jack including a pair of spaced plates connected with the rod line, a pair of racks slidably mounted with respect to the plates and respectively connected with the power line and hook ofi line, and a pair of pawls carried by the plates and engaging the racks to prevent relative movement between the plates and racks in one direction, one of said racks being provided with a tension element for moving said rack relative to the plates in one direction.

6. The combination with a pump for lifting a sucker rod, a reciprocating power line, a hook off line, and a rod line for operatively connecting the pump and power line, of a pick-up jack for interposition between the power line and rod line, said pick-up jack including a pair of spaced plates connected with the rod line, a pair of racks slidably mounted with respect to the plates and re spectively connected with the power line and hook off line, and a pair of pawls carried by the plates and engaging the racks to prevent hereto.

JACK C. MGKINZIE. 

